Requirements: Windows XP / Vista / Windows 7 / XP 64-bit / Vista 64-bit / Windows 7 64-bit / Windows 8 / Windows 8 64-bit / Windows 10 / Windows 10 64-bit
NEW Experimental feature: Language packs can now be selected in the Advanced Options. Preference intl.multilingual.enabled needs to be set (and possily also extensions.langpacks.signatures.required needs to be set to false)
CHANGED ADD-ON SUPPORT: Restartless add-ons continue to work if their authors have made the necessary minor adjustments. Non-restartless legacy add-ons using XUL overlays are only supported if add-on authors have adapted them, and Lightning/Calendar is the only one we know that has been adapted.
CHANGED Add-on overlays now loaded with Thunderbird's own overlay loader
CHANGED Improved phishing attempt detection for messages with certain forms
CHANGED The stand-alone options window has been removed, all options are now shown in a tab
FIXED Thunderbird hung if HTML signature references non-existent image
FIXED Filters not working for headers that appear more than once
FIXED mbox to maildir conversion not working if Windows search integration is enabled
60.2.1 ESR Below items what were released in Thunderbird 60.2.1 but were not included in TB 60 beta 11
FIXED Links in the Add-on Manager's search results and theme browsing tabs open in external browser
FIXED Localized versions of Thunderbird didn't show a localized name for the "Drafts" and "Sent" folders for certain IMAP providers (particularly in France)
FIXED Replying to a message with an empty subject inserted Re: twice